Other Financial Instruments and Fair Value Measurements (Details Textual) (USD $) In Millions, unless otherwise specified	Jan. 31, 2014
Other Financial Instruments and Fair Value Measurements (Textual) [Abstract]
Company's Municipal bond mature in 2014	$ 0.9
Company's Municipal bond mature in 2015	1.6
Company's Municipal bond mature in 2016	0.5
Company's Municipal bond mature in 2017	1.7
Company's Municipal bond mature in 2018 and beyond	$ 26.7